Cosmetic applicator

Abstract

The invention provides a cosmetic applicator capable of ensuring liquid supply to the applicator and ensuring writing performance during upward writing / writing after upward storage. A cosmetic applicator is characterized in that the cosmetic applicator is provided with: a collector core for guiding a cosmetic liquid from a cosmetic liquid tank to an application part; a collector for temporarily storing the cosmetic liquid, the collector core being disposed through the interior of the collector; and a cosmetic liquid holding part provided in the collector, the cosmetic liquid holding part forming a space capable of holding the cosmetic liquid, and the cosmetic liquid held in the cosmetic liquid holding part being in contact with the collector core.

Description

Technical Field

[0001] The present invention relates to a cosmetics applying tool containing cosmetic liquid. Background Art

[0002] When the application part such as the pen tip of an eyeliner pen with a low-viscosity cosmetic liquid in a conventional collector is pointed upward, the cosmetic liquid will move to the lower side of the ink cartridge, which may cause white spots when writing upward or the pen may dry out during storage. Therefore, patent documents 1 to 3 disclose cosmetic application tools that have an ink reservoir at the rear end of the collector.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-126873

[0006] Patent Document 2: Japanese Patent Application Publication No. 2004-98318

[0007] Patent Document 3: Japanese Patent Application Publication No. 2002-225489 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] However, in Patent Documents 1 to 3, since the ink reservoir is formed of a member such as a porous body, the supply of the cosmetic liquid to the collector core (relay core) may be hindered, and the supply may not be sufficient.

[0010] The present invention has been made in view of the above-mentioned actual situation, and an object of the present invention is to provide a cosmetic applicator which can ensure liquid supply to the applicator during writing in an upward direction or after being stored in an upward direction, thereby ensuring writing performance.

[0011] Solutions for solving problems

[0012] In order to solve the above problems, the present invention provides a cosmetic liquid holding portion in the collector as a space capable of storing cosmetic liquid even when the collector is in an upward static state, and by holding a certain amount of cosmetic liquid, the cosmetic liquid can be supplied to the collector core (relay core) even when the collector is in an upward state.

[0013] Specifically, the present invention is a cosmetic applicator, characterized in that the cosmetic applicator comprises: a collector core, which guides the cosmetic liquid from the liquid storage part to the application part; a collector, which temporarily accumulates the cosmetic liquid, and the collector core is arranged in the collector; and a cosmetic liquid retaining part, which is arranged in the collector, and the cosmetic liquid retaining part forms a space capable of retaining the cosmetic liquid, and the cosmetic liquid retained in the cosmetic liquid retaining part is in contact with the collector core.

[0014] In the present invention, preferably, the cosmetic liquid holding portion forms a space of a cross-sectional concave portion capable of holding the cosmetic liquid at the rear portion of the collector, and the space of the cross-sectional concave portion is in contact with the collector core.

[0015] In the present invention, it is preferred that the cosmetic liquid holding portion can hold the cosmetic liquid in a space between sheet-like bodies provided at the front portion or the center portion of the collector, and the space between the sheet-like bodies is in contact with the collector core.

[0016] In the present invention, preferably, the cosmetic liquid holding portion is integrally formed with the collector.

[0017] The cosmetic liquid holding portion preferably holds 20 mg to 40 mg of cosmetic liquid. The cosmetic liquid holding amount is obtained by subtracting the product weight at the time of writing upwards and causing white spots from the product weight before writing in a cosmetic liquid filled state.

[0018] Effects of the Invention

[0019] According to the applicator of the present invention, it is possible to achieve an excellent effect that the liquid supply to the applicator can be ensured during upward writing or writing after being stored upward, thereby ensuring writing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 1 is an explanatory diagram of a state where the cosmetic applicator according to the first embodiment of the present invention is capped. Figure 1 (a) is a side view, Figure 1 (b) is the overall longitudinal section view. Figure 1 (c) is from Figure 1 (b) is an overall longitudinal cross-sectional view rotated 90 degrees along the circumferential direction.

[0021] Figure 2 yes Figure 1 Illustration of the cosmetic applicator with the cap removed and facing upward, Figure 2 (a) is the overall longitudinal section view, Figure 2 (b) is an enlarged view of the collector periphery in this state.

[0022] Figure 3 yes Figure 1 Component diagram of a collector in a cosmetic applicator, Figure 3 (a) is a stereogram viewed from the front. Figure 3 (b) is the view from the front, Figure 3 (c) is a side view observed from the slit side. Figure 3 (d) is from Figure 3 (c) A side view of the image rotated 90 degrees along the circumferential direction. Figure 3 (e) is along Figure 3 (c) is a longitudinal cross-sectional view of line EE, Figure 3 (f) is a stereogram viewed from the rear. Figure 3 (g) is a view from the rear.

[0023] Figure 4 yes Figure 1 A three-dimensional view of a cosmetic application tool as viewed from a quarter section of the application portion to the front rod.

[0024] Figure 5 It shows the evaluation results of Examples 1 to 3 in the forced blur test.

[0025] Figure 6 The following table shows the evaluation results of Comparative Examples 1 to 3 in the forced blur test.

[0026] Figure 7 FIG. 2 is a component diagram of a collector in a cosmetic applicator according to a second embodiment. Figure 7 (a) is a stereogram viewed from the front. Figure 7 (b) is the view from the front, Figure 7 (c) is a side view observed from the slit side. Figure 7 (d) is from Figure 7 (c) A side view of the image rotated 90 degrees along the circumferential direction. Figure 7 (e) is along Figure 7 (c) is a longitudinal cross-sectional view of line EE, Figure 7 (f) is a stereogram viewed from the rear. Figure 7 (g) is the view from the rear, Figure 7 (h) is along Figure 7 (d) Cross section of the HH line.

[0027] Figure 8 This is a perspective view of the cosmetic applicator according to the second embodiment, viewed from a quarter cross section of the application portion to the front stem.

[0028] Fig. 9 1 is a component diagram of a collector in a cosmetic applicator according to a third embodiment. Fig. 9 (a) is a stereogram viewed from the front. Fig. 9 (b) is the view from the front, Fig. 9 (c) is a side view observed from the slit side. Fig. 9 (d) is from Fig. 9 (c) A side view of the image rotated 90 degrees along the circumferential direction. Fig. 9 (e) is along Fig. 9 (c) is a longitudinal cross-sectional view of line EE, Fig. 9 (f) is a stereogram viewed from the rear. Fig. 9(g) is the view from the rear, Fig. 9 (h) is along Fig. 9 (d) Cross section of the HH line.

[0029] Fig.10 This is a perspective view of the cosmetic applicator according to the third embodiment, viewed from a quarter cross section of the application portion to the front stem. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0031] Figure 1 FIG. 1 is an overall explanatory diagram of a cosmetic applicator according to a first embodiment of the present invention. Figure 2 This is a diagram showing the cap removed. Figure 3 is a diagram of the components of the collector, Figure 4 This is an explanatory perspective view of the front part.

[0032] [Cosmetic application tools as a whole]

[0033] like Figure 1 , Figure 2 As shown, the applicator of the first embodiment is a cosmetic applicator, which comprises: a rod body 14, which is formed by combining a rear rod 12 and a front rod 10 provided with an applicator (writing part) 18 in the front; a cap 20, which is removable relative to the front part of the rod body 14 and covers the applicator 18; a collector (temporary storage body) 16, which is installed in the rod body 14 (front rod 10) and has a comb-tooth-shaped outer peripheral surface; a liquid storage part 14a, which is arranged in the internal space of the rear part (rear rod 12) of the rod body 14 and stores cosmetic liquid; a collector core (guide body) 22, which guides the cosmetic liquid in the liquid storage part 14a to the applicator 18; the collector 16 temporarily accumulates the cosmetic liquid supplied to the applicator 18; and a cosmetic liquid retaining part 30, which is arranged at the rear part of the collector 16, and the cosmetic liquid retaining part 30 is opened to the rear and is roughly cup-shaped, and is formed by the space of the cross-sectional concave part. Furthermore, the gap between the inner periphery of the rod body 14 (front rod 10) and the outer periphery of the collector 16 is 0.05 mm or less.

[0034] [Rod body 14]

[0035] Specifically, in the cosmetic applicator, the rod body 14 is composed of a front rod 10 and the rear side of the front rod 10 embedded in the rear rod 12, and a collector 16 is arranged at the front of the rod body 14. The collector 16 is formed in a comb shape with multiple sheet-like portions (also called fins or corrugated portions) arranged in the axial direction, and the liquid storage portion 14a in the rear part of the rod body 14 (rear rod 12) stores cosmetic liquid.

[0036] A front rod 10 supporting an applicator 18 is installed at the front portion of the rod body 14, a collector 16 is installed in the front rod 10 at the front portion, and a box-type liquid storage portion 14a is arranged in the rear rod 12 at the rear portion. The cosmetic applicator is a direct liquid type cosmetic applicator in which cosmetic liquid is stored in the liquid storage portion 14a in a direct liquid manner.

[0037] [Front bar 10]

[0038] like Figure 2 As shown, with respect to the outer peripheral surface of the front rod 10, the front end portion is tapered, and a flange 10a is formed in the central portion protruding in the outer diameter direction for positioning when the cap 20 is engaged, a concave-convex portion is formed in front of the flange 10a for engaging the cap 20, and a concave-convex portion is formed in the rear for engaging the rear rod 12. In addition, an air replacement hole 10b is formed in front of the concave-convex portion of the front rod 10 and passes through the peripheral surface inside and outside. The rear portion of the front rod 10 extends, and a cylindrical portion 10c for accommodating the front portion of the liquid storage portion 14a extends inside, and a protrusion 10c1 for locking and fixing the liquid storage portion 14a is formed inside the cylindrical portion 10c (refer to Figure 4 ). When the collector 16 and the liquid storage part 14a are installed in the front rod 10, an appropriate gap is provided between the front end of the liquid storage part 14a and the rear end of the cosmetic liquid holding part 30 of the collector 16.

[0039] [Rear bar 12]

[0040] The rear rod 12 is cylindrical with a closed rear portion, and the front portion covers the rear portion of the front rod 10 from the flange 10a of the front rod 10 and is fitted to the front rod 10, forming a roughly tubular shape that accommodates a liquid storage portion 14a inside the rear portion of the front rod 10.

[0041] [Liquid Storage Section 14a]

[0042] In the liquid storage part 14a, no impregnated body such as a cotton wick is arranged, but the cosmetic liquid is directly accommodated, and a stirring body (a medium-shaped body, a ball, etc.) 14b for stirring the cosmetic liquid is arranged. Figure 2 This shows the upward smearing state, in which the stirring body 14b is in contact with the rear end portion of the liquid storage portion 14a.

[0043] [Makeup liquid]

[0044] The cosmetic liquid is characterized in that it contains at least 0.2% to 5% by mass of a dispersant composed of carbon black, water and a film-forming resin, 2% to 15% by mass (converted to solid content) of a film-forming agent and less than 0.5% by weight of a surfactant, and the viscosity obtained by an ELD type viscometer at a temperature of 25°C and a shear rate of 192S-1 is in the range of 2mPa·s to 8mPa·s.

[0045] The carbon black used as the coloring material is not particularly limited as long as it is carbon black generally used as a coloring material for black liquid cosmetics, and various carbon blacks can be used.

[0046] The content of the carbon black is preferably 1% to 15% by mass, and more preferably 3% to 10% by mass, relative to the total amount of the liquid cosmetic. If the content of the carbon black is less than 1% by mass, the color is light and insufficient as a cosmetic. On the other hand, if the content of the carbon black exceeds 15% by mass, the viscosity becomes too high, and the liquid cannot be smoothly ejected in the cotton core type, collector type, or other liquid cosmetic applicator of the present invention, which is not preferred.

[0047] The dispersant is composed of a film-forming resin, improves the dispersibility of carbon black as a coloring material, and also functions as a film-forming resin.

[0048] The dispersant that can be used is not particularly limited as long as it has the above-mentioned function. For example, copolymers composed of one or more selected from acrylic acid, methacrylic acid or their alkyl esters or derivatives, vinyl acetate, and vinyl pyrrolidone, betaine type alkyl acid-based amphoteric resins, etc. are mentioned. From the perspective of further dispersibility of carbon black, copolymers of one selected from acrylic acid, methacrylic acid or their alkyl esters or derivatives and vinyl acetate, copolymers of vinyl pyrrolidone and vinyl acetate, and copolymers of one or more selected from acrylic acid, methacrylic acid or their alkyl esters and octylacrylamide are preferred. From the perspective of further dispersibility and film-forming ability, copolymers of one or more selected from acrylic acid, methacrylic acid or their alkyl esters and octylacrylamide are particularly preferred.

[0049] The content of these dispersants is preferably 0.5% by mass to 5% by mass, more preferably 2% by mass to 4% by mass, based on the total amount of the liquid cosmetic.

[0050] When the content of the dispersant is less than 0.5% by mass, the dispersion stability of carbon black as a coloring material becomes insufficient. On the other hand, when the content of the dispersant exceeds 5% by mass, the viscosity becomes too high and no improvement in dispersion stability is observed, which is uneconomical.

[0051] Examples of the film-forming agent used in the present invention include emulsion resins of copolymers of one or more monomers selected from acrylic acid, methacrylic acid or their alkyl esters or derivatives, styrene, and vinyl acetate.

[0052] In the present invention, the above-mentioned dispersant is also composed of a film-forming resin, and is different from the above-mentioned dispersant in that it is a soluble resin and an emulsion resin, and the emulsion resin is an aqueous suspension obtained by emulsion polymerization of monomers in water. In the dispersion of carbon black in the present invention, a dispersion of carbon black is obtained in which the soluble resin is more stable than the emulsion resin. The use is differentiated in this respect.

[0053] The content of the film-forming agent (emulsion resin) is preferably 2% to 15% by mass, more preferably 5% to 10% by mass, based on the total amount of the liquid cosmetic in terms of solid content (resin component).

[0054] When the content of these film-forming agents (emulsion resins) is less than 2% by mass in terms of solid content (resin component), the water resistance is poor. On the other hand, when the content exceeds 15% by mass in terms of solid content (resin component), the application part (brush hair, pen core, etc.) of the liquid cosmetics applicator may dry out and the application may not be possible, which is not preferred.

[0055] In addition, a surfactant may be used to stabilize these film-forming agents (emulsion resins). However, since the surfactant mixed therewith has little influence on the fixation property of the present invention, the content thereof is not considered.

[0056] The surfactant used in the present invention relates to the dispersion of carbon black and is a surfactant that functions as a dispersion aid. Examples thereof include nonionic surfactants, anionic surfactants, and cationic surfactants. In addition to lecithin, propylene glycol fatty acid esters, glycerol fatty acid esters, and polyglycerol fatty acid esters, examples thereof include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkyl ether phosphoric acid / phosphates, polyethylene glycol fatty acid esters, alkyl sulfates, sulfonates, and polyoxyethylene alkyl ether sulfates, or a mixture of two or more thereof.

[0057] The content of these surfactants is preferably 0.5% by mass or less, more preferably 0% by mass to 0.3% by mass, based on the total amount of the liquid cosmetic.

[0058] When the content of the surfactant exceeds 0.5% by weight, water resistance is poor and sufficient fixing force cannot be obtained, which is not preferable.

[0059] The liquid cosmetic of the present invention uses water (including purified water, distilled water, ion exchanged water, pure water, ultrapure water, etc.) as a solvent. The content of the water is the balance of the above-mentioned components and the optional components described below.

[0060] Furthermore, the liquid cosmetic of the present invention may contain, in addition to the essential ingredients, any ingredients used in conventional liquid cosmetics, etc. Specifically, appropriate amounts of preservatives, antioxidants, neutralizers, ultraviolet absorbers, chelating agents, moisturizers, cosmetic ingredients, fragrances, viscosity modifiers, etc. may be contained within a range that does not impair the effects of the present invention.

[0061] In the liquid cosmetic of the present invention, the viscosity measured by an ELD type viscometer at a temperature of 25° C. and a shear rate of 192 s −1 is in the range of 2 mPa·s to 8 mPa·s, and particularly preferably 3 mPa·s to 6 mPa·s.

[0062] When the viscosity value is less than 2 mPa·s, the liquid flows to wrinkles and causes bleeding. On the other hand, when it exceeds 8 mPa·s, the viscosity is high, so it is not preferable for the liquid cosmetics built into the liquid cosmetics applicator using the brush hair or the pen core as the application member of the present invention to spray the liquid smoothly. In addition, the viscosity measurement conditions (including the embodiments described later) specifically refer to the values ​​measured by the ELD type viscometer manufactured by Tokimec at a temperature of 25°C and a shear rate of 192 (s-1) when the standard conical rotor is 50 rpm.

[0063] The surface tension of the liquid cosmetic of the present invention is preferably 30 mN / m to 40 mN / m. The surface tension is measured at 25°C using a CBVP-Z surface tensiometer (plate method) manufactured by Kyowa Interface Chemical Co., Ltd.

[0064] 〔Material of each part〕

[0065] The front rod 10, the rear rod 12, the rod body 14, the collector 16, the cap 20, etc. can be made of resin molded products. In addition, the stirring body 14b can use a ball material made of metal, resin, etc.

[0066] [Applicator 18]

[0067] The applicator 18, which is a pen body having a tapered tip, protrudes from the opening of the front end of the front rod 10, and the cap 20 covering the applicator 18 is a structure that can be detachably fitted to the front rod 10. The front rod 10 has a substantially conical side surface shape and is formed to be tapered at the front end, and the front end angle of the front rod 10 is preferably formed to be substantially the same angle as the front end angle of the applicator 18.

[0068] In addition, if Figure 2 As shown in (b), the applicator 18 has a hollow portion 18a from the rear end to the inside, and the front end 22a of the collector core 22 is embedded in the hollow portion 18a. By embedding, the cosmetic liquid in the liquid storage portion 14a transferred via the collector core 22 is fully supplied to the applicator 18.

[0069] The applicator 18 is a pen body with a thinner tip made of resin fiber, natural fiber bundle, or resin porous body. The rear end of the applicator 18 is enlarged in a flange shape, and the enlarged portion engages with the front rod 10 to prevent it from falling off. In addition, the applicator 18 is preferably a pen body, but in addition, various applicators for applying cosmetic liquid can be used. In addition, the front end of the applicator 18 is arranged at a position deviated from the axis of the applicator 18, the so-called center line, and has a side ridge connecting the end on the opposite side of the front end across the axis to the front end, and the side ridge is inclined relative to the axis of the applicator 18 to form a specified angle less than 90 degrees, preferably 60 to 80 degrees, so that it can draw from a thin line to a thick line.

[0070] [Cap 20]

[0071] like Figure 1 As shown, the cap 20 covers the application body 18 when it is embedded in the front rod 10 to prevent the application body 18 from drying out. Figure 2 As shown, when removed, the applicator 18 is exposed and cosmetics can be applied. In the cap 20, a cup-shaped inner cap 20a is arranged in a manner that can move forward and backward to cover the applicator 18 to improve airtightness, and a spring 20b is arranged to bias the inner cap 20a backward.

[0072] [Configuration Structure in the Front Bar 10]

[0073] Inside the hollow front rod 10 with a thinner top, behind the smear body 18, as shown in FIG. Figure 3 The collector 16 is provided with a plurality of corrugated sheet-like bodies arranged therein, and a collector core (corresponding to a guide core) 22 is arranged to penetrate through a hollow portion 16d of the collector 16. The collector core 22 can be formed of a capillary member such as a resin fiber bundle, a natural fiber bundle, or a resin porous body.

[0074] In the collector core 22, the collector core 22 does not protrude from the rear end of the collector 16 into the liquid storage portion 14a of the rod body 14. The rear end surface of the collector core 22 is roughly consistent with the rear end surface of the collector 16. By making the collector core 22 consistent, the rear end of the collector core 22 does not protrude into the liquid storage portion 14a, and the volume in the liquid storage portion 14a can be ensured. In addition, since the rear end of the collector core 22 does not protrude into the liquid storage portion 14a, when the stirring body 14b is arranged in the liquid storage portion 14a, even if the stirring body 14b moves in the liquid storage portion 14a, it will hit the cosmetic liquid retaining portion 30, and will not collide with the collector core 22 and deform the collector core 22, so that the cosmetic liquid can be fully infiltrated.

[0075] [Collector 16]

[0076] The collector 16 is a structure covered and held by the rod bodies 14 of the front rod 10 and the rear rod 12. Figure 2 , Figure 3 As shown, the collector 16 has a bowl-shaped portion 16a formed at the front end in the axial direction, and a cosmetic liquid retaining portion 30 is formed at the rear end with a diameter larger than the diameter of each temporary storage portion 16b. In addition, in the collector 16, a plurality of temporary storage portions 16b are formed in the central portion between the bowl-shaped portion 16a and the cosmetic liquid retaining portion 30 in the axial direction, and a plurality of comb-shaped fins (sheet-shaped bodies) are arranged at intervals. In the axial direction of the collector 16, a supporting wall 28 that is a thick plate relative to the fins of the temporary storage portion 16b is formed between the temporary storage portions 16b in the plurality of locations. As shown in FIG. Figure 2 As shown, the temporary storage portion 16b is formed to have a diameter larger than that of the bowl-shaped portion 16a, and the cosmetic liquid holding portion 30 is formed to have a diameter larger than that of the temporary storage portion 16b and the supporting wall 28. The structure is as follows: the bowl-shaped portion 16a is embedded in the front portion of the front rod 10 where the front end is narrowed, the cosmetic liquid holding portion 30 is embedded in the rear portion of the front rod 10, and the collector 16 is fixed in the front rod 10.

[0077] The collector core 22 is provided in the collector 16. In the embodiment, a tubular portion 16e having a cylindrical wall without holes is formed near the axial center of the collector 16, and a hollow portion 16d is provided in the tubular portion 16e penetrating along the axial center.

[0078] A plurality of thin plate-like fins (sheet-like bodies) are arranged in a comb-like shape on the outer periphery of the wall of the tubular portion 16e having the hollow portion 16d, extending in the outer diameter direction, and constitute a temporary storage portion 16b that temporarily stores the cosmetic liquid between the fins.

[0079] The collector 16 has a collector core 22 installed in the hollow portion 16d inside the tubular portion 16e, and the collector core 22 allows the cosmetic liquid to flow near the axial center portion inside the collector 16e. The outer periphery of the tubular portion 16e has a plurality of comb teeth, i.e., fins (temporary storage portion 16b), and the tubular portion 16e is a non-porous wall shape without a hole penetrating the wall between the inner periphery and the outer periphery.

[0080] The front end portion 22a of the collector wick 22 is fitted into the hollow portion 18a of the applicator 18. The collector wick 22 passing through the tubular portion 16e in the collector 16 guides the cosmetic liquid in the liquid storage portion 14a.

[0081] In the collector 16, a longitudinal groove, i.e., a slit 26, for guiding the cosmetic liquid into the gap between the fins is formed in a manner that is exposed at the rear end (can be exposed to the liquid storage portion 14a side) from the temporary storage portion 16b to the cosmetic liquid holding portion 30. In addition, each plurality of fins in the temporary storage portion 16b is appropriately separated from each other by a thick support wall 28 that abuts against the inner surface of the front rod 10. Specifically, the number of fins in the temporary storage portion 16b can be 40 to 60 in total, and the interval between the fins can be 0.15 mm to 0.3 mm.

[0082] The liquid storage portion 14a can store 0.7 (ml) of liquid. The outer diameter of the rod 14 is 8.5 (mm), and the diameter of the collector 16 is 6.0 (mm).

[0083] [Cosmetic liquid holding portion 30]

[0084] The collector core does not protrude from the cosmetic liquid retaining portion 30 at the rear end of the collector 16 into the liquid storage portion 14a, but the space 30r in the cosmetic liquid retaining portion 30 faces the open front end of the liquid storage portion 14a, and the cosmetic liquid retaining portion 30 and the collector core 22 form a structure in which the cosmetic liquid is fully spread.

[0085] The outer peripheral surface (protrusion 30 b ) of the cosmetic liquid holding portion 30 provided at the rear portion of the collector 16 is in liquid-tight contact with the inner wall surface of the front rod 10 .

[0086] Specifically, a sealing portion (protrusion 30b) is provided on the outer circumference of the front end of the cosmetic liquid holding portion 30 to seal with the front rod 10 (rod body 14), and a fitting portion 30c is formed on the outer circumference of the rear end to prevent separation from the front rod 10 (shaft tube 14). Furthermore, the cosmetic liquid holding portion 30 at the rear end of the collector 16 is embedded in the inner surface of the front rod 10, and the collector 16 is fixed to the front rod 10.

[0087] In detail, Figure 2 (b) Figure 3 , Figure 4 As shown, the cosmetic liquid holding portion 30 is formed continuously with the temporary storage portion 16b and the rear end of the tubular portion 16e. Specifically, the cosmetic liquid holding portion 30 has a disc-shaped expanded wall-shaped base portion 30a formed at the rear end of the tubular portion 16e, and a concentric and substantially cylindrical outer wall portion 30o and inner wall portion 30i extending rearward from the base portion 30a.

[0088] It is preferred that the outer wall portion 30o and the inner wall portion 30i form a substantially cup shape with a space 30r therebetween. The space 30r has a function of retaining cosmetic liquid, and the amount of cosmetic liquid retained is 20 mg to 40 mg.

[0089] The outer wall portion 30o and the inner wall portion 30i are respectively formed with an opening groove 30o1 and an opening groove 30i1, which expand the space 30r. The opening groove 30o1 of the outer wall portion 30o is formed continuously at one location along the axial direction on the same side as the slit 26.

[0090] A protrusion 30b is formed on the outer peripheral surface of the front end of the outer wall portion 30o of the cosmetic liquid holding portion 30, protruding in the outer diameter direction near the outer periphery of the base portion 30a. The protrusion 30b is formed in the shape of an annular rib as a sealing portion to maintain liquid tightness when fitted to the inner peripheral surface of the front rod 10 (rod body 14). A fitting portion 30c for preventing separation from the front rod 10 is formed on the outer peripheral surface of the rear end of the outer wall portion 30o.

[0091] The inner wall portion 30i has opening grooves 30i1 formed at two locations on the same side and opposite side to the slit 26. The inner diameter of the inner wall portion 30i is a diameter that can tightly fit the rear end of the collector core 22. For example, it can be the same as the inner diameter of the hollow portion 16d in the tubular portion 16e.

[0092] The cosmetic application tool of the embodiment is a collector type application tool. In the cosmetic application tool, by making the front end side of the application body 18 face downward, the cosmetic liquid flows into the cosmetic liquid holding part 30. Figure 2 As shown, in the cosmetic applicator, when the applicator 18 side faces upward, the cosmetic liquid that has entered the cosmetic liquid holding portion 30 is held by the surface tension of the content liquid so as not to drip downward.

[0093] Therefore, when the pen dries up during upward writing or storage, the cosmetic liquid held in the space 30r of the cosmetic liquid holding portion 30 is supplied to the intermediate core (collector core 22) through the opening grooves 30i1 and 30o1.

[0094] Here, if a component such as a porous body is arranged in the liquid retaining portion, there is a concern that in the case of a liquid with a small contact area between the cosmetic liquid and the liquid retaining portion and a low surface tension, the retaining force is weak and the liquid cannot be retained, and there is a concern that the liquid may not be supplied sufficiently to the application portion due to the component. However, in an embodiment, by providing an inner wall (inner wall portion 30i), the contact area between the cosmetic liquid and the cosmetic liquid retaining portion 30 can be increased, and even liquids with a low surface tension can be easily retained.

[0095] Example 1

[0096] Collector 16

[0097] Ratio: front side (temporary storage part 16b) 80%, rear side (cosmetic liquid holding part 30) 20% (when the liquid holding amount is 30 mg)

[0098] According to the following structure and Figure 1 to Figure 4In the cosmetic applicator of the present invention, a cosmetic liquid having the following composition is used.

[0099] [Structure of the front bar 10]

[0100] Made of polypropylene, length: 50mm, tapered front end length: 15mm, front end opening diameter: 2mm, rear end opening diameter: 6mm

[0101] (Structure of rear rod 12, stirring body 14b, collector 16, and collector core 22)

[0102] Rear rod 12: Polypropylene resin, outer diameter: 10mm, length: 90mm

[0103] Stirring body 14b: Weight: 0.40g, stainless steel, shape: cylindrical φ2.5mm×length 10mm

[0104] Collector 16: The total number of fins of the temporary storage part 16b is 47, the ratio of the temporary storage part 16b is 80%, the ratio of the cosmetic liquid holding part 30 is 20% (when the liquid holding amount is 30 mg), and the interval between the fins is 0.15mm to 0.3mm.

[0105] The storage volume of the liquid storage part 14a is 0.7 (ml), the outer diameter of the liquid storage part 14a is 8.5 (mm), the inner diameter is 4.5 (mm), and the outer diameter of the collector 16 is 6.0 (mm).

[0106] Collector core 22: Polyester porous body, porosity 60%, diameter 2mm x length 35mm

[0107] (Structure of the smear body 18)

[0108] The smearing body 18 is made of polybutylene terephthalate resin fibers as a raw material, has a length of 15 mm, a diameter of 100 μm, approximately 300 to 350 fibers, and a flange portion with a diameter of 5 mm.

[0109] Composition of the cosmetic liquid (black) used in the test

[0110] Carbon black: 8%

[0111] Alkyl acrylate copolymer emulsion: 20%

[0112] ※Yodosol GH800F (glass transition temperature: -15°C, solid content 45%, manufactured by Nurion Japan)

[0113] Caprylamide Acrylates / Acrylates Copolymer: 1.2%

[0114] ※AMPHOMER HC (solid content 100%, manufactured by Nurion Japan)

[0115] Polyethylene glycol alkyl ether: 0.2%

[0116] Sodium diethylhexyl sulfosuccinate solution: 0.1%

[0117] Ethylhexylglycerin: 0.2%

[0118] Disodium EDTA: 0.3%

[0119] 1,3-Butanediol: 10%

[0120] Methylparaben: 0.3%

[0121] Sodium dehydroacetate: 0.3%

[0122] Aminomethylpropanol: 0.1%

[0123] Refined water: Remaining

[0124] Physical properties of the cosmetic liquid (black) used in the test

[0125] Shear rate 192 (s-1) Viscosity: 4 mPa·s

[0126] Surface tension: 35mN / m

[0127] Specific gravity: 1.05

[0128] <About the upward spreadable amount measurement test>

[0129] <About the mandatory white-out test>

[0130] After heating the cosmetic applicator for 45 minutes at 60°C with the pen side facing upward, the applicator was taken out and fully cooled at room temperature while facing upward, and the upward application state was evaluated. The number of samples was n = 3 and the samples were divided into samples with and without a cosmetic liquid holding portion for comparative measurement.

[0131] <Method for judging the results of the forced white spot test>

[0132] The state in which the white spots are restored until 10 lines with a length of 30 mm are written is designated as A, and the state in which the white spots are not restored is designated as B. In this evaluation, A is superior to B.

[0133] <Results of the forced white spot test>

[0134] In the case of a sample provided with a cosmetic liquid holding portion (refer to Figure 5 ),from Figure 5The left frame represents Example 1, Example 2, and Example 3, all of which were evaluated as A.

[0135] In the case of the sample without the cosmetic liquid holding portion (refer to Figure 6 ), indicating Comparative Example 1, Comparative Example 2, and Comparative Example 3, all of which were evaluated as B.

[0136] <The amount of cosmetic liquid retained by the sample of the above forced whitening test result>

[0137] When a cosmetic liquid holding unit is provided

[0138] Example 1 40.1 mg

[0139] Example 2 20.2 mg

[0140] Example 3 30.3 mg

[0141] When the cosmetic liquid holding unit is not provided

[0142] Comparative Example 1 9.1 mg

[0143] Comparative Example 2 8.7 mg

[0144] Comparative Example 3 8.2 mg

[0145] Next, a cosmetic applicator according to a second embodiment will be described. Figure 7 A collector according to a second embodiment is shown. Figure 8 This figure shows a quarter cross section of the cosmetic applicator from the application part to the front rod. Figure 1 to Figure 4 The same parts are marked with the same reference numerals. Figure 8 and Figure 4 Similarly, the cosmetic applicator is shown in the figure, and the rear rod 12, the liquid storage part 14a, the stirring body 14b, etc. are omitted from the figure, but the omitted parts are the same structures as those of the first embodiment.

[0146] The cosmetic applicator of the second embodiment has Figure 1 to Figure 4 The collector 16 and the cosmetic liquid holding part 30 of the first embodiment shown in FIG. 1 are different in structure from the collector 116 and the cosmetic liquid holding part 130. Figure 8 As shown, the cosmetic liquid holding part 130 can hold the cosmetic liquid in a space 130a between a plurality of sheet-like bodies overlapped and arranged in the center of the collector 116 in the longitudinal direction. The space 130a between the sheet-like bodies contacts the collector core 22 via the communication hole 130a1.

[0147] [Configuration Structure of Collector 116]

[0148] Inside the hollow front rod 10 with a thinner front end, behind the smear body 18, Figure 8 The collector 116 is provided with a plurality of corrugated sheet-like bodies arranged therein, and a collector core (corresponding to a guide core) 22 is arranged to penetrate through a hollow portion 116d of the collector 116. The collector core 22 can be formed of a capillary member such as a resin fiber bundle, a natural fiber bundle, or a resin porous body.

[0149] In the collector core 22, the collector core 22 does not protrude from the rear end of the collector 116 into the liquid storage portion (not shown) of the rod body 14. The rear end face of the collector 116 is roughly consistent with the rear end face of the collector core 22 (on the same plane). By making the rear end faces of the collector core 22 of the collector 116 consistent, the rear end of the collector core 22 will not protrude into the liquid storage portion, thereby ensuring the volume in the liquid storage portion. In addition, since the rear end of the collector core 22 will not protrude into the liquid storage portion, when a stirring body (not shown) is provided in the liquid storage portion, even if the stirring body moves in the liquid storage portion, it will hit the rear end face of the collector 116, and will not collide with the stirring body to deform the collector core 22, so that the cosmetic liquid can be fully infiltrated.

[0150] [Collector 116]

[0151] like Figure 8 As shown, the collector 116 is a structure covered and held by the rod bodies 14 of the front rod 10 and the rear rod 12 .

[0152] like Figure 7 As shown, the collector 116 is formed with a bowl-shaped portion 116a at the front end in the axial direction. In the collector 116, a collector body is provided behind the bowl-shaped portion 116a, and the collector body is formed by sequentially connecting the temporary accumulation portion 116bf at the front, the cosmetic liquid holding portion 130 at the center, and the temporary accumulation portion 116br at the rear, and the collector body is formed so that the overall diameter is larger than the diameter of the bowl-shaped portion 116a.

[0153] The rear end surface of the collector 116 facing the liquid storage portion is formed with a recess (groove) 116f. Figure 8 As shown, the rear end of the collector core 22 protrudes into the recess 116f, and the cosmetic liquid easily flows to the rear of the collector core 22 through the recess 116f, but the rear end of the collector core 22 is not protruded from the rear end surface of the collector 116, so that the stirring body in the liquid storage part does not touch the collector core 22. The rear end of the slit 26 also faces the recess 116f (refer to Figure 7 ), the stirring body does not hit the slit 26. Since the slit 26 is a fine gap with high precision, the precision can be reliably maintained by preventing the stirring body from hitting the slit 26.

[0154] In the collector 116, the front temporary storage portion 116bf and the rear temporary storage portion 116br are formed into a structure in which a plurality of comb-tooth-shaped fins (sheet-shaped bodies) are arranged with gaps therebetween.

[0155] The cosmetic liquid holding portion 130 has a structure in which a plurality of thin plate-shaped fins (sheet-shaped bodies) are arranged in a comb-teeth shape with gaps therebetween.

[0156] In the second embodiment, a cylindrical tubular portion 116e is formed near the axial center of the collector 116. The tubular portion 116e has a hollow portion 116d extending along the axial center. The collector core 22 is disposed in the hollow portion 116d.

[0157] The cosmetic liquid retaining part 130 is formed with a plurality of fins (sheet-like bodies) that are spread out in a thin plate shape on the outer periphery of the wall of the tubular part 116e. In the portion of the tubular part 116e where the cosmetic liquid retaining part 130 is formed, the plurality of fins (sheet-like bodies) are exposed in the hollow part 116d, and a connecting hole 130a1 is formed to connect the space 130a between the fins with the hollow part 116d. In consideration of the fluidity of the liquid, the connecting hole 130a1 is formed to have a circumferential length of 0.15 mm to 1 / 3 of the entire circumference.

[0158] Therefore, the collector core 22 arranged in the hollow portion 116d contacts the space 130a between the fins of the cosmetic liquid retaining portion 130 via the connecting hole 130a1. As a result, in the cosmetic liquid retaining portion 130, a structure is formed in which the cosmetic liquid retained (accumulated) in the space 130a contacts the collector core 22 via the connecting hole 130a1 and flows.

[0159] In the collector 116, a plurality of fins (sheet-like bodies) formed in the shape of thin plates are arranged in a comb-like manner in front of and behind the cosmetic liquid holding part 130 on the outer periphery of the wall of the tubular part 116e having the hollow part 116d, and in the temporary storage parts 116bf and 116br, which are extended in the outer diameter direction. The temporary storage parts 116bf and 116br are configured to temporarily store the cosmetic liquid between the fins via the slits 26. In the tubular part 116e, the temporary storage parts 116bf and 116br are provided without holes and are separated from the hollow part 116d and are independent, such as Figure 7 As shown in (e) of FIG. 1 , the cosmetic liquid on the liquid storage section 14a side flows only through the slit 26 vertically penetrating the temporary storage sections 116bf and 116br.

[0160] In addition, if Figure 7 (e), Figure 7As shown in (h), in the collector 116, the portion where the slit 26 is formed at the same position in the axial direction as the portion where the cosmetic liquid retaining portion 130 is formed becomes a portion (solid portion) 130b where there is no space 130a between the fins of the cosmetic liquid retaining portion 130. This portion 130b is not formed with the communicating hole 130a1, and is therefore separated by the tubular portion 116e and is not connected to the inside of the hollow portion 116d.

[0161] Therefore, since there is a portion (solid portion) 130 b where the space 130 a does not exist, the slit 26 does not communicate with the space 130 a of the cosmetic liquid retaining portion 130 , and the cosmetic liquid on the liquid storage portion side does not flow into the cosmetic liquid retaining portion 130 through the slit 26 .

[0162] In the axial direction of the collector 116, a support wall 28 having a thicker plate than the fins of the temporary storage parts 116bf and 116br is formed between the front temporary storage part 116bf, the cosmetic liquid holding part 130, and the rear temporary storage part 116br.

[0163] The number of fins of the front temporary storage part 116bf and the rear temporary storage part 116br is 40 to 60 in total, and the interval between the fins can be set to 0.15 mm to 0.3 mm. In addition, the interval between the fins of the space 130a of the cosmetic liquid holding part 130 is configured to be the same as the interval between the front temporary storage part 116bf and the rear temporary storage part 116br, 0.15 mm to 0.30 mm.

[0164] According to the liquid cosmetic applicator of the second embodiment, since the cosmetic liquid retaining portion 130 retains the cosmetic liquid in the space 130a provided between the sheet bodies of the collector 116 by capillary force, the cosmetic liquid can be reliably retained compared to the case where the cosmetic liquid is formed in the rear end recess of the first embodiment.

[0165] When the applicator 18 (applicator) of the liquid cosmetic applicator is facing upward, the surface tension of the liquid content in the cosmetic liquid retaining portion 130 and the liquid retention force of the collector are used to prevent the liquid from dripping downward. When the applicator 18 is facing upward or when the applicator is stored and the liquid is dried, the cosmetic liquid retained in the cosmetic liquid retaining portion 130 is supplied from the open groove (communication hole 130a1).

[0166] The cosmetic liquid holding unit 30 of the first embodiment is Figure 2The rear end recess (space 30r) shown in the figure is formed into a hollow shape, but if it is a recess, the contact area between the cosmetic liquid and the retaining portion becomes smaller, and in the case of a liquid with a small surface tension, the retaining force becomes weaker, and it may be difficult to retain the liquid. However, in the second embodiment, since the liquid can be retained in the space 130a between the sheet bodies of the cosmetic liquid retaining portion 130 formed in the collector 116, the capillary force is used to improve the retaining force.

[0167] Next, a cosmetic applicator according to a third embodiment will be described. Fig. 9 In represents the collector, Fig.10 The overall structure of the cosmetic application tool is shown in . Figure 1 to Figure 4 The same parts are denoted by the same reference numerals.

[0168] The cosmetic applicator of the third embodiment has Figure 7-Figure 8 The collector 116 and the cosmetic liquid retaining portion 130 of the second embodiment shown in the figure are different in structure from the collector 116A and the cosmetic liquid retaining portion 130A. The same reference numerals are used to denote the same parts as those of the second embodiment.

[0169] like Fig. 9 , Fig.10 As shown, the cosmetic liquid holding portion 130A is provided at the front of the collector 116A and can hold the cosmetic liquid in the space 130a between the multiple overlapping sheets. The space 130a between the sheets is in contact with the collector core 22 via the communication hole 130a1.

[0170] In addition, if Fig. 9 (e), Fig. 9 As shown in (h), in the collector 116A, the portion where the slit 26 is formed at the same position in the axial direction as the portion where the cosmetic liquid retaining portion 130A is formed becomes a portion 130b of the cosmetic liquid retaining portion 130A where the space 130a between the fins does not exist. This portion 130b is not formed with the communicating hole 130a1, and is therefore separated by the tubular portion 116e and is not connected to the inside of the hollow portion 116d.

[0171] Therefore, since there is a portion 130 b where the space 130 a does not exist, the slit 26 does not communicate with the space 130 a of the cosmetic liquid retaining portion 130 , and the cosmetic liquid on the liquid storage portion side does not flow into the cosmetic liquid retaining portion 130A through the slit 26 .

[0172] On the outer periphery of the wall of the tubular portion 116e having the hollow portion 116d, a plurality of thin plate-shaped fins (sheet-shaped bodies) extending in the outer diameter direction are arranged in a comb-tooth shape at two locations behind the cosmetic liquid retaining portion 130A in temporary storage portions 116b1 and 116b2.

[0173] The functions of the cosmetic liquid retaining portion 130A and the temporary storage portions 116b1 and 116b2 are the same as those of the cosmetic liquid retaining portion 130 and the temporary storage portions 116bf and 116br of the second embodiment.

[0174] However, since the cosmetic liquid holding portion 130A is located close to the applicator 18 , when the applicator 18 dries, the applicator 18 stops drying quickly via the collector wick 22 .

[0175] The other structures and effects are the same as those of the second embodiment.

[0176] In addition, each embodiment and example shows a preferred example of the present invention, but the present invention is not limited thereto, and various modifications can be implemented within the scope of the present invention.

[0177] Industrial Applicability

[0178] The cosmetic applicator of the present invention can be used for application in various ways, particularly upward application.

[0179] Description of Reference Numerals

[0180] 10, front rod; 10a, flange; 10b, air replacement hole; 12, rear rod; 14, rod body; 14a, liquid storage part; 14b, stirring body; 16, collector; 16a, bowl-shaped part; 16b, temporary storage part; 16d, hollow part; 16e, tubular part; 18, smear body; 18a, hollow part; 20, cap; 20a, inner cap; 20b, spring; 22, collector core; 22a, front end ; 26, slit; 28, supporting wall; 30, cosmetic liquid retaining portion; 30a, base; 30b, protrusion; 30c, fitting portion; 30i, inner wall portion; 30i1, opening groove; 30o, outer wall portion; 30o1, opening groove; 30r, space; 130, cosmetic liquid retaining portion (second embodiment); 130a, space; 130a1, connecting hole; 130A, cosmetic liquid retaining portion (third embodiment).

Claims

1. A cosmetic application tool, characterized in that: The cosmetic applicator has: a collector core that guides the cosmetic liquid from the liquid storage portion to the application portion; A collector temporarily stores the cosmetic liquid, wherein the collector core is disposed through the collector; as well as a cosmetic liquid holding portion, which is provided in the collector, The cosmetic liquid holding portion forms a space capable of holding cosmetic liquid, and the cosmetic liquid held in the cosmetic liquid holding portion is in contact with the collector wick.

2. The cosmetic applicator according to claim 1, characterized in that: The cosmetic liquid holding portion has a space of a concave cross-section capable of holding cosmetic liquid formed at the rear of the collector, and the space of the concave cross-section is in contact with the collector core.

3. The cosmetic applicator according to claim 1, characterized in that: The cosmetic liquid holding portion can hold cosmetic liquid in a space between sheet-like bodies provided at the front portion or the center portion of the collector, and the space between the sheet-like bodies is in contact with the collector core.

4. The cosmetic applicator according to claim 2 or 3, characterized in that: The cosmetic liquid holding portion is integrally formed with the collector.

Images